- Dark matter is present in all galaxies, including our planet.
- At this time there are no substntiating facts pertaining this hypothetical phenomenon.
- At the same time, it is exciting time to work on finding those answers.
Presently, physicists have not reached any consensus pertaining to the explanation of x-ray radiation from space by the decay of dark matter particles. The phenomenon still remains a mystery. Dark matter continues to be a contested topic among many physicists around the globe. There is no plausible resolution about the x-rays and the dark matter.
It is highly likely in the near future two scenarios will occur:
1) We’ll gain solid proof of dark matter.
2) The possibility of dark matter will be completely abandoned.
New work by University of Michigan and University of Berkleyscientists “The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations” outline an analysis of these theories.
Dark matter is present in all galaxies, including our own. In fact, the Milky Way is immersed in a spherical cloud of this substance. If it emits x-rays they must be constantly picked up by x-ray telescopes.
There are a myriad of detectors on our planet with the sole function of detecting dark matter particles, but none have produced tangible results. The scientists analyzed images obtained by the XMM-Newton telescope over 20 years. In total, the data covered about a year of net observation time. The researchers eliminated the signal of the object that the instrument was aimed at, and looked for radiation actually emitted by empty space (or rather, dark matter filling it).
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The hypothesis that dark matter consists of sterile neutrinos, whose decay generates radiation with an energy of 3.5 Kev, was tested with unprecedented accuracy. Unfortunately, it was not confirmed. In 2014, the scientific world was thrilled by the announcement of x-ray radiation with a quantum energy of 3.5 kiloelectronvolts (Kev) coming from distant galaxies. The original theory was that these photons are emitted by dark matter. These are hypothetical particles that eventually break up into ordinary neutrinos, emitting electromagnetic radiation. Sterile neutrinos with an energy of 7 Kev would produce x-ray quanta with an energy of just 3.5 Kev.
In addition, the intensity of the radiation corresponded well to the amount of dark matter in the observed cluster of galaxies. However, as with many theories, there is no solid proof or further information about the sterile neutrinos.
Sterile neutrinos are hypothetical particles, which interact via gravity and do not interact via any of the fundamental interactions of the Standard Model. The term sterile neutrino is used to distinguish them from the known active neutrinos in the Standard Model, which are charged under the weak interaction.
It is too early to dismiss the hypothesis that dark matter consists of sterile neutrinos. We can assume that these particles decay less frequently than was thought, and emit quanta of different energy. The latter, by the way, can be checked, because the method proposed by the authors is suitable for searching for radiation from dark matter at different wavelengths.
One thing is certain at the moment: the assumption that dark matter consists of sterile neutrinos, whose decay generates radiation with an energy of 3.5 Kev, was untenable.
The future of physics is exciting and hopefully future findings will successful answer our questions.